Executing commands in a different parent shell?

I'm a bit of a UNIX newbie. I would like to start up a command such as "rsync" and let it go in the background in the OS X terminal, and be able to then quit the terminal and have the process continue to function. I can't seem to find the way to do this. When I use the "&" character at the end of the command, it puts the command in the background and lets me execute others, but if I kill the shell it also kills that process. I'm figuring this is because the process is a child of the shell and killing the parent gets rid of all running child processes. Is there a simple way to get a command to run in a parallel shell or in another parent so I can start it up in the terminal and then quit the terminal but have the process continue?

I've been messing around with the "nohup" command, and just tried your inclusion of it with the "&" character to background the task. For my tests I'm copying ~64MB from a temporary folder called "Experiments" to a backup folder, and I'm redirecting all the output into a logfile using the verbose flag on rsync and ">>" in the command. Here's the command:
nohup rsync -av --delete ~/Desktop/Experiments/ ~/Desktop/Backup/ >> ~/Desktop/backup.log &
It sends the process to the background, and if I keep the shell open it takes a couple of seconds and then exits normally, terminating the process upon completion. If I close the terminal immediately after executing the command it copies a few items, but then breaks with an error that it outputs in the log file (mentions something about a broken pipe):
building file list ... done
created directory /Users/tkessler/Desktop/Backup
.DS_Store
2007-12-05 TK WTc10b Ana copy 10.pxp
2007-12-05 TK WTc10b Ana copy 11.pxp
2007-12-05 TK WTc10b Ana copy 12.pxp
2007-12-05 TK WTc10b Ana copy 13.pxp
2007-12-05 TK WTc10b Ana copy 14.pxp
2007-12-05 TK WTc10b Ana copy 15.pxp
2007-12-05 TK WTc10b Ana copy 2.pxp
2007-12-05 TK WTc10b Ana copy 3.pxp
2007-12-05 TK WTc10b Ana copy 4.pxp
2007-12-05 TK WTc10b Ana copy 5.pxp
2007-12-05 TK WTc10b Ana copy 6.pxp
2007-12-05 TK WTc10b Ana copy 7.pxp
2007-12-05 TK WTc10b Ana copy 8.pxp
2007-12-05 TK WTc10b Ana copy 9.pxp
2007-12-05 TK WTc10b Ana copy.pxp
2007-12-05 TK WTc10b Ana.pxp
2007-12-05 TK WTc8b Ana copy 10.pxp
2007-12-05 TK WTc8b Ana copy 11.pxp
rsync error: received SIGUSR1 or SIGINT (code 20) at /SourceCache/rsync/rsync-30/rsync/rsync.c(231)
rsync: writefd_unbuffered failed to write 104 bytes: phase "unknown" [generator]: Broken pipe (32)
rsync error: error in rsync protocol data stream (code 12) at /SourceCache/rsync/rsync-30/rsync/io.c(909)
-----

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Edited by: 904032 on Jun 26, 2012 12:02 AM

The fact that you are supplying a file path (more correctly known as a directory) is going to be your first problem. Security within Oracle means that access to files on the file server require a directory object to be specified and these directory objects refer to a specific directory on the file server. If you're going to be passing different directories into your procedure then you're going to have to have different directory objects set up for all the possible directories that can be accessed (or issue dynamic DDL to redefine a known directory object each time).
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Thanks, The details are:
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First of all, thanks a lot by your help.
I will try explain better (sorry about my english).Don't worry about that!
There are several servers and clients that I want to
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(if the system is running correctly in every
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Everywhere?? Are you sure? Sounds extremely insecure, to me!
In terms of security, the application will need a
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I want to go in the right direction :)
Thank you!Ok, you've actually got several problems to solve here. You need a single monitoring app that runs on these servers, which allows you to connect to it from over a network, so that you can request the logs, or issue the admin commands. Then you need a client to connect to that piece of software, and since you want to do this via a web browser, that's probably best to be a servlet. How I'd tackle this, I'd first write the server software that does the listening, and have it pretend to send logs, reboot machines and what-not. Then I'd write the servlet and the web pages to control and monitor it. Then I'd go about writing the hooks between your shiny server and the various commands you need to run. You could do them in any order you like, really. The trick is, though - and this applies to all software projects - to tackle them one by one. Almost all problems can be decomposed into smaller, more manageable chunks. Do that, and nothing will be so scary again

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I've done a quick search, but was getting confused with some answers I found, so forgive me if this is answered elsewhere.
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ls -l todo.sh
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Execute command fails

Hi All,
I am facing a weird problem with the Runtime.exec command. I am trying to run a simple Linux command from within Java. But i noticed that commands gets stuck if i run it on a file larger than 2K! If I run the same command on the linux shell it does not fail and it does not get stuck. it ends within less than a second.
Since I do not want my program to get stuck, I used some code someone published (cannot remember who... but thanks :)) which kills the process after some timeout time. But I still failed to understand why the command gets stuck. Its definitely has to do with file size, since if i take the same file and remove some lines from it, the program does not get stuck. Again running the same command on linux shell does not get stuck and finishes very fast.
Here's the simplified version of my code,
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.TimeoutException;
import java.io.DataInputStream;
* Execute command from the Runtime. This class will make sure the external application will not hung the application by specifying
* a timeout in which the application must return. If it does not an InterruptedException will be thrown
class JPT_RuntimeExecutor
     private long timeout = Long.MAX_VALUE;
      * Default constructor - Timeout set to Long.MAX_VALUE
     public JPT_RuntimeExecutor()
     // Do nothing
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      Execute a Runtime process
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     * @param env - Environment variables to put in the Runtime process
     * @return The output from the process
     * @throws IOException
     * @throws TimeoutException - Process timed out and did not return in the specified amount of time
     public InputStream execute(String command, String[] env) throws IOException, TimeoutException
          Process p = Runtime.getRuntime().exec(command, env);
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          // Set a timer to interrupt the process if it does not return within the timeout period
          Timer timer = new Timer();
          timer.schedule(new InterruptScheduler(Thread.currentThread()), this.timeout);
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               throw new TimeoutException(command + "did not return after "+this.timeout+" milliseconds");
          finally
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               buffer.append((char) br.read());
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     private class InterruptScheduler extends TimerTask
          Thread target = null;
          public InterruptScheduler(Thread target)
               this.target = target;
          public void run()
               target.interrupt();
public static void main(String[] args)
      try
          String cmd = "dot -Tplain " + args[0];
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}Here's a sample of the input file I give which gets stuck ( in case you want to run it :))
digraph koko{
label="PT=result\nFILE=BottomWindowPathSearch#1Transitive49211"
27 [label="START\nAC=4363", color=blue]
29 [label="END\nAC=4363", color=blue]
69 [label="UOP\nAC=4363", color=black]
71 [label="ALLOCATE\nAC=3780", color=black]
73 [label="EXECUTE\nAC=2995", color=black]
75 [label="RETIRE\nAC=3286", color=black]
860 [label="alstall_jeclearing\nAC=56", color=black]
869 [label="JECLEAR\nAC=56", color=black]
69 -> 29 [label="PRB=0.221\nAC=963", color=blue]
71 -> 29 [label="PRB=0.053\nAC=202", color=blue]
73 -> 29 [label="PRB=0.029\nAC=87", color=blue]
75 -> 29 [label="PRB=0.963\nAC=3111", color=blue]
73 -> 75 [label="PRB=0.96\nDUR=10/124/1620\nAC=2876", color=black]
71 -> 73 [label="PRB=0.778\nDUR=8/91/1628\nAC=2983", color=black]
75 -> 71 [label="PRB=0.031\nDUR=2/300/1414\nAC=99", color=black]
71 -> 75 [label="PRB=0.088\nDUR=10/59/1246\nAC=339", color=black]
860 -> 71 [label="PRB=0.732\nDUR=24/30/36\nAC=41", color=black]
71 -> 860 [label="PRB=0.01\nDUR=4/87/1100\nAC=40", color=black]
71 -> 71 [label="PRB=0.055\nDUR=4/109/1044\nREP=1.02\nAC=205*1.02", color=black]
73 -> 860 [label="PRB=0.002\nDUR=16/20/22\nAC=5", color=black]
75 -> 75 [label="PRB=0.004\nDUR=4/189/920\nAC=14", color=black]
73 -> 71 [label="PRB=0.006\nDUR=4/144/708\nAC=18", color=black]
73 -> 73 [label="PRB=0.003\nDUR=2/196/568\nAC=9", color=black]
75 -> 73 [label="PRB=0.001\nDUR=6/12/18\nAC=2", color=black]
75 -> 860 [label="PRB=0.002\nDUR=2/46/170\nAC=6", color=black]
860 -> 75 [label="PRB=0.018\nDUR=2\nAC=1", color=black]
869 -> 75 [label="PRB=1\nDUR=18/83/982\nAC=56", color=black]
71 -> 869 [label="PRB=0.015\nDUR=20/109/1628\nAC=56", color=black]
860 -> 73 [label="PRB=0.018\nDUR=24\nAC=1", color=black]
69 -> 71 [label="PRB=0.778\nDUR=2/117/1502\nAC=3395", color=black]
27 -> 69 [label="PRB=0.996\nDUR=430/20932/38130\nAC=4345", color=blue]
860 -> 69 [label="PRB=0.232\nDUR=10/19/30\nAC=13", color=black]
69 -> 860 [label="PRB=0.001\nDUR=26/50/82\nAC=5", color=black]
71 -> 69 [label="PRB=0.001\nDUR=2/7/14\nAC=5", color=black]
27 -> 71 [label="PRB=0.004\nDUR=584/13675/37096\nAC=18", color=blue]
If you remove about 8 lines it will not get stuck!
Hope someone can help me figure out why this is happenning
thanks
eman

Thanks ... somehow I missed this issue..
The article you sent was really helpful :) recommended for every one
Here's the code if anyone ever needs it... it runs with timeout so that the program does not get stuck
Enjoy
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.TimeoutException;
import java.io.DataInputStream;
import java.io.*;
* Execute command from the Runtime. This class will make sure the external application will not hung the application by specifying
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     * @param env - Environment variables to put in the Runtime process
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            System.out.println( " Could not open file" + outfileName + "!!!");
          System.out.println( "Start reading output " );
          System.out.println( " ============================== " );
          String input = null ;
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                System.out.println( input );
          catch ( Exception e)
            System.out.println( " Could not read line !!!");
          return null;
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    String type;
    OutputStream os;
    StreamGobbler(InputStream is, String type)
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    StreamGobbler(InputStream is, String type, OutputStream redirect)
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                pw = new PrintWriter(os);
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                    pw.println(line);
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                  System.out.println(type + ">" + line);
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                pw.flush();
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            ioe.printStackTrace();
     private class InterruptScheduler extends TimerTask
          Thread target = null;
          public InterruptScheduler(Thread target)
               this.target = target;
          public void run()
               target.interrupt();
public static void main(String[] args)
      try
          String cmd = "dot -Tplain " + args[0];
          System.out.println( " cmd = " + cmd );
             JPT_RuntimeExecutor m_process = new JPT_RuntimeExecutor(5000);
             DataInputStream tmpStreamReader = null;
             try
                  tmpStreamReader = new DataInputStream( m_process.execute(cmd, null , args[1] ));
             } catch (IOException e)
                  e.printStackTrace();
                  return;
             } catch (TimeoutException e)
                  e.printStackTrace();
                  return ;
                 System.out.println( "END");
      catch ( Exception e )
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}

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Hello:
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Error Type: UNKNOWN
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thanks very much
jing

Dear MarcusP:
Thank you very much.
your solution really works. The attached is the detailed information of the problem. Would you like to tell me more about the prolem and how to solve the problem thoroughly.
Thank you very much.
yours
Jing
Attachments:
DIAdem_Error.doc ‏305 KB

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Hi frank,
Thanks to reply me...
I'm refreshing table's iterator on each command button's action to reflect the changed result... and i'm sorry i mentioned two pages in my project.. actually these are two forms in the same page..which conditionally changed its renderer properties.. its working fine when only one form is renderred and the otherside when both are rendered then it is not working.
Hope this change will help you to understand the problem.. if something else you are looking for then please tell me..
Thanks
Fizzz...

Lom doesn't execute commands

I'm new in Sun, i just recieved a sun v100 server, i already connected the server to a workstation (using the hyperterminal tool) and it seemmed to be fine... however when the LOM> prompt appears and i try to introduce various commands but it does nothing.
LOMlite starting up.
CPU type: H8/3437S, mode 3
Ram-test: 2048 bytes OK
Initialising i2c bus: OK
Searching for EEPROMs: 50(cfg)
I2c eeprom @50: OK
i2c bus speed code 01... OK
Probing for lm80s: none
Probing for lm75s: 48
Initialising lm75 @48: OK
System functions: PSUs fans breakers rails gpio temps host CLI ebus clock
LOMlite console
lom>
LOM event: +0h0m0s LOM booted
lom>poweron
(it does nothing...)
also when i turn the server on with the on/standby switch it also seems to be starting fine, but again when the ok prompt is displayed i try to execute commands and it does again nothing.
Firmware CORE Sun Microsystems, Inc.
@(#) core 1.0.18 2002/05/23 18:22
Software Power ON
Verifying NVRAM...Done
Bootmode is 0
MCR0 = 57b2ce06
MCR1 = 80008000
MCR2 = cff0ffff
MCR3 = b00003ff
Ecache Size = 512 KB
Clearing E$ Tags Done
Clearing I/D TLBs Done
Probing memory
Done
MEMBASE=0xc0000000
MEMSIZE=0x20000000
Clearing memory...Done
Turning ON MMUs Done
Copy ROM to RAM (154720 bytes) Done
Orig PC=0x1fff0007edc New PC=0xf0f07f34
Processor Speed=648MHz
Looking for Dropin FVM ... found
Decompressing Client Done
Transferring control to Client...
Reset Control: BXIR:0 BPOR:0 SXIR:0 SPOR:1 POR:0
Probing upa at 1f,0 pci
Probing upa at 0,0 SUNW,UltraSPARC-IIe (512 Kb)
Loading Support Packages: kbd-translator
Loading onboard drivers:
Probing /pci@1f,0 Device 7 isa dma rtc power SUNW,lomh serial serial
flashprom
Probing /pci@1f,0 Device 3 pmu i2c temperature dimm dimm dimm dimm
i2c-nvram idprom motherboard-fru ppm beep fan-control
lomp
Probing Memory Bank #0 512 Megabytes
Probing Memory Bank #1 512 Megabytes
Probing Memory Bank #2 512 Megabytes
Probing Memory Bank #3 512 Megabytes
Probing /pci@1f,0 Device 7
Probing /pci@1f,0 Device 3
Probing /pci@1f,0 Device c ethernet
Probing /pci@1f,0 Device 5 ethernet
Probing /pci@1f,0 Device a usb
Probing /pci@1f,0 Device d ide disk cdrom
todm5819 Sun Fire V100 (UltraSPARC-IIe 648MHz), No Keyboard
OpenBoot 4.0, 2048 MB memory installed, Serial #53320536.
Ethernet address 0:3:ba:2d:9b:58, Host ID: 832d9b58.
Environment monitoring: disabled
ok boot
(again... did nothing)
i think is a hyperterminal configuration problem but please advide.
thanks in advance.

I think I took the wrong path to validate the New Zealand specific tax number. Is it possible to set some rules in PRST1_005 in table T005.
If this is possible then please pass me the steps description.
Thanks.
Naz

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